400HD IP Phones Series - Teams Compatible
Administrator's Manual 80 Document #: LTRT-09960
3.4.16 Configuring Media Streaming
This section describes configuring the Media Streaming parameters. Only the parameters
documented in this section are applicable.
3.4.16.1 Configuring Quality of Service
This section shows how to configure Quality of Service (QoS) using the Configuration File.
To configure QoS:
• Open the Configuration File page (Management tab > Manual Update >
Configuration File) and configure the parameter using the table below as
reference.
Table 3-34: QoS Parameters
Parameter Description
voip/media/media_tos
Defines DS (Differentiated Services) containing a DSCP
(Differentiated Services Code Point) value and an ECN
(Explicit Congestion Notification) value.
DSCP is backwards compatible with ToS. ECN is not.
QoS in hexadecimal format, TOS is part of the IP header that
defines the type of routing service to tag outgoing voice
packets originated from the phone. It informs routers that this
packet must receive a specific QoS. Values can be set in
decimal (e.g., 184) or hexadecimal (e.g., 0xb8). The default
value is 0xb8 (184).
The network administrator must therefore take into account
the two LSBs that are reserved for ECN, when setting the
desired value for DSCP, e.g., for a DSCP value of 46 (EF),
the proper value for this parameter should be 184 in decimal,
or 0xb8 in HEX, which corresponds to ‘10111000’. For a
DSCP value of 22 (AF23), this parameter should be set to 88
decimal or 0x85 in HEX (‘01011000’).
See RFC 3168 for detailed information.
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